<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>测试表单</title>
</head>
<body>
<form action="/chapter03/requestServlet03" method="post">
    用户名：<input type="text" name="username"><br>
    爱好：<input type="checkbox" name="sports" value="游泳">游泳
    <input type="checkbox" name="sports" value="爬山">爬山<br>
    <input type="submit" value="提交">
</form>
</body>
</html>